Caution
Installers should inquire of local water purveyors as to the suitability of their supply for use
in hydronic heating systems.
If water quality is questionable, a local water treatment expert must be consulted for testing,
assessment and, if required, treatment.
Alternatively, water or hydronic fluid of known quality can be brought to the site.
7.1.9 Freeze protection
Maintenance to prevent freezing Frequency Check
Check the freeze protection. Use only antifreeze made specifically for
hydronic systems. Inhibited propylene glycol is recommended. Antifreeze
volume must be between 25% and 50% of the total volume of water in the
system.
Annually
□
Warning
Do not use automotive-type ethylene or other types of automotive glycol antifreeze, or
undiluted antifreeze of any kind. This may result in severe boiler damage. It is the
responsibility of the Installer to ensure that glycol solutions are formulated to inhibit
corrosion in hydronic heating systems of mixed materials. Improper mixtures and chemical
additives may cause damage to ferrous and non-ferrous components as well as non-
metallic, wet components, normally found in hydronic systems. Ethylene glycol is toxic,
and may be prohibited for use by codes applicable to your installation location. For
environmental and toxicity reasons, IBC recommends only using non-toxic propylene
glycol.
7.1.10 Boiler treatment
Maintenance for Boiler Treatment Frequency Check
Check consistency of any boiler treatment used, for appropriate mixture.
Chemical inhibitors are consumed over time, lowering their density.
Annually
□
Verify proper operation after servicing.
Annually
□
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